CONSOLIDATED STATEMENT OF EQUITY (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2013
Series C preferred dividends and dividends payable, per share (in dollars per share)	$ 0.393
Series A Cumulative Redeemable Preferred Stock
Preferred dividends and dividends payable, per share (in dollars per share)	$ 0.50
Series D Cumulative Redeemable Preferred Stock
Preferred dividends and dividends payable, per share (in dollars per share)	$ 0.50